<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="example-1">
        <!-- <button v-on:click="counter += 1">增加1</button> -->
        <button v-on:click="addCounter">增加1</button>
        <p>这个按钮被点击了 {{counter}} 次</p>
    </div>
    <script src="../js/vue.js" charset="utf-8"></script>
    <script type="text/javascript">
        var example = new Vue({
            el: '#example-1',
            data: {
                counter: 0
            },
            methods: {
                addCounter: function (event) {
                    this.counter += 1;
                    console.log(event.target.tagName);
                }
            }
        })
    </script>
</body>
</html>
